Brittle fracture in glassy polymers

DOI Web Site 被引用文献1件
  • Masaru Ishikawa
    a Faculty of Engineering , Yamagata University Jonan , 4-3-16 Yonezawa 992, Japan
  • Hiroyuki Ogawa
    a Faculty of Engineering , Yamagata University Jonan , 4-3-16 Yonezawa 992, Japan
  • Ikuo Narisawa
    a Faculty of Engineering , Yamagata University Jonan , 4-3-16 Yonezawa 992, Japan

書誌事項

公開日
1981-06
DOI
  • 10.1080/00222348108015312
公開者
Informa UK Limited

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説明

Abstract The brittle fracture behavior of round-notched poly(methyl methacrylate), poly(vinyl chloride), and polystyrene bars has been studied at varying temperatures and bending rates. Brittle fracture originating from internal crazes occurs in a restricted range of temperature. When the plastic deformation zone at the tip of the notch reached a certain size, which decreased with decreasing temperature or increasing bending rate, the internal crazes nucleated at the elastic-plastic boundary. The extrapolation of the position of internal craze nucleation versus temperature plots showed that the nucleation of well defined internal crazes developed above the temperature of the 3 loss peak in each glassy polymer. The mechanism of the ductile-brittle fracture transition at the β-transition temperature in glassy polymers can be understood in terms of variation of the position of internal craze nucleation with temperature and/or strain rate.

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